body{
    background-color: #000;
}
/*去除顶端留白*/
/*div{
    overflow: hidden;
}*/
h1,p{
    margin: 0;
    padding: 0;
}
/*页面宽度定义 居中*/
.wrapper{
    width: 1006px;
    background-color: #fff211;
    margin: 0 auto;/*针对父容器居中*/
}
.clear{
    clear: both;
}
.header{
    width: 991px;
    background-color: white;
    margin:  0 auto;
    min-height: 200px;
}

.main{
    width: 991px;
    background-color: green;
    margin:  0 auto;
    /*min-height: 40px;*/
}
.footer{
    width: 991px;
    background-color: blue;
    margin:  0 auto;
    min-height: 80px;
}
.main .sidebar{
    float: left;
    width: 244px;
    margin-right: 5px;
    background-color: purple;
    min-height: 600px;
}
.main .content{
    float: left;
    width: 742px;
    background-color: chartreuse;
    min-height: 600px;
}